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Issue 18.5 ('OOP Listbox')
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Better Examples—ListBox Part 3

From Ooops! to OOP with the ListBox

Issue: 18.5 (September/October 2020)
Author: Markus Winter
Author Bio: Markus is a Molecular Biologist who taught himself REALbasic programming in 2003 to let the computer deal with some exceedingly tedious lab tasks. Some call it lazy, he thinks it smart. He still thinks of himself as an advanced beginner at best.
Article Description: No description available.
Article Length (in bytes): 34,682
Starting Page Number: 28
Article Number: 18503
Resource File(s):

Download Icon project18503.zip Updated: 2020-08-31 22:37:24

Related Web Link(s):

e 17.4 (http

Excerpt of article text...

Last time we laid out what we want to achieve and how, and explained what an interface is and how it solves three problems at once for us. So this time we'll get straight into the project.

The first thing we do after all this talking about interfaces is to create one, so add an interface to a new project (menu Insert and choose Class Interface) and rename it to CanDrawItself (and yes, I settled on a shorter and better name for the interface). Add the following empty method to it (in effect you are adding only the signature of the method):

Public Sub Draw(g as Graphics, whatToDraw as String)

End Sub

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